Darkhunter,
By coming here you have made progress, alot, for yourself. I can't add anything to the great advice you have already recieved, except that I really admire your initiative for asking for help and describing your situation so well.
I hope you and your sister can focus on keeping free of the brain-twisting effects of living with an alcoholic. As with all alcoholics, you mom must make the choice for sobriety on her own - but there is always hope that she will make that choice.